In photoelectric experiment, collector plate is made negative with respect to emitter plate till it reached a certain potential V when the photocurrent is zero. If K indicates kinetic energy of an emitted photoelectron, then at point between the plates, which of the following holds correct?
Answer & explanation
Correct answer: option 3
When photocurrent is zero, this means that the stopping potential just begins repelling the most energetic electrons i.e. the kinetic energy is converted into potential energy. Therefore, K=eV.